5G NR
Why Throughput appears as -1 in Application_Packet_Log.csv in the Log Folder
After simulating a NetSim scenario, users may notice that the throughput field in the Application_Packet_Log.csv file appears as -1. This often leads to confusion, especially when parsing log files directly from the log folder without using the GUI. ...
Network Slicing in 5G
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v14.4 <In progress...> For per UE and per Slice metrics on resource allocation refer to the following article: How to obtain PRB allocation metrics for 5G simulations in NetSim?
How to obtain PRB allocation metrics for 5G simulations in NetSim?
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v14.4 Base stations (gNBs) generally deal with multiple mobile stations UEs, some of which require larger bandwidths than others and some of which have better connections (signal ...
Obtaining the SINR-BLER curves for MCS indices in NetSim 5G
Applicable versions NetSim Standard Netsim Pro Applicable Releases v15.0 In this article we will explain (i) how to obtain the SINR-BLER curve by fixing a particular MCS value. (ii) how to extend (i) for all the different available MCSs Note that in ...
Simulating Ping Pong Handover in 5G
Applicable Versions NetSim Standard NetSim Pro In 5G networks, maintaining seamless connectivity as user equipment (UE) moves is critical. This connectivity is ensured through handover, where an ongoing call or data session is transferred from one ...
Simulating a simple DDoS attack in 5G
Applicable versions NetSim Standard Netsim Pro Applicable Releases v14.0 v14.1 v14.2 A DDoS attack in a 5G environment involves overwhelming a targeted 5G network, service, or infrastructure with a flood of malicious traffic, disrupting its normal ...
How to model A5 handovers in NetSim 5G?
In cellular networks, the A5 handover is a method used for maintaining signal quality as mobile devices move across different sectors. It differs from A3 handover by using signal strength thresholds from both the source and target base stations for ...
How to change the time-interval for radio measurements in NetSim 5G?
Applicable Versions NetSim Standard NetSim Professional Applicable Releases v13.3 v14.0 By default the log entries in the 5G radio measurements log file are written for every 1 ms. However, this time interval can be changed by modifying the ...
Generating Voronoi tessellations for NetSim 5G scenarios
Applicable Versions NetSim Standard NetSim Pro Voronoi tessellation, also known as Voronoi diagrams or Voronoi cells, is a mathematical concept used in various fields, including computer science and telecommunications. It is a way to partition space ...
SINR heatmap for a 7 cell and a 19 cell 5G scenario using NetSim
In a 5G network, gNBs are deployed to provide wireless coverage and service to UEs. In canonical models, gNBs are typically located at the center of hexagonal cells, which are arranged in a hexagonal pattern over a geographic area. Each gNB can serve ...
NetSim 5G: Packet flow through the 5G stack and transmission over the air
Applicable versions NetSim Standard Netsim Pro Applicable Releases v13 In this article, we explain what happens to an IP packet as it flows through the 5G stack. This includes the addition of overheads, segmentation, aggregation etc. NetSim ...
How to obtain SINR, MCS and Throughput vs. Time for a 5G 1gNB-1UE scenario with a time varying radio channel in NetSim?
Applicable versions NetSim Standard Netsim Pro In a 5G network, the User Equipments (UE) such as 5G smartphones connect over the 5G RAN to a base station or gNB. This in turn connects to the 5G core which connects out to the Data Network (DN) like ...
Obtaining BLER vs. Time in NetSim 5G when running Outer loop link adapation (OLLA)
Applicable versions NetSim Standard NetSim Pro Applicable Releases v15.0 Create scenario with 1 gNB and 1 UE with the following properties gNB - UE distance = 1800m Band = n78, C band. BW = 10 MHz Pathloss Model: 3GPP Rural macro The application flow ...
Simple 5G Use Case: End to end simulation with 1 gNB and multiple UEs
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13.1 v13.2 v13.3 Goal 5G E2E Real World Simulation. System Level simulation including the PHY Scenario gNB x 1 (Antenna 4x4) UE x 5 (Antenna 2x2 in different locations) TDD FR1 ...
Simulating 5G Heterogenous Networks (HetNets) in NetSim
Applicable versions NetSim Standard Netsim Pro Applicable Releases v13.2 v13.3 v14.0 5G Heterogenous networks (HetNets) typically have a multi-tier structure with two (or more) types of BSs operating in the same or different frequency bands. For ...
5G Data Rate and Throughput Calculator
Applicable Versions NetSim Standard NetSim Pro NetSim calculates the PHY rate per the 3GPP formula, which is explained in the infographic below. A simple, approximate way to think of the above formula is Data Rate = BW * Q * R * N * (1 - OH) ... (1) ...
Passing 5G parameters such as SNR, MCS, Bits Per PRB from NetSim to MATLAB at runtime
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13.1 The parameters such as MCS and SNR are unique to each carrier and each MIMO layer, in NetSim. The maximum number of carriers that can be aggregated is 14 and the maximum number ...
NetSim 5G: Introducing propagation delay considering speed of light
Applicable Versions NetSim Standard NetSim Pro Applicable Release v13.1 The article explains how users can introduce propagation delay in NetSim 5G simulations by modifying the underlying source code. By default, NetSim assumes this propagation delay ...
5G Example: Performance analysis involving handovers for large number (50) UEs
Applicable Versions NetSim Standard NetSim Pro Applicable Release v14.0 The 5G handover procedure implemented in NetSim is based on the Strongest Adjacent Cell Handover Algorithm (Ref: Handover within 3GPP LTE: Design Principles and Performance. ...
5G UAV/Drone network simulation using NetSim-MATLAB Interfacing
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v12.2 v13.2 MATLAB Version R2019b or above MATLAB Toolbox MATLAB, Simulink, Robotics and System Toolbox File Exchange Project of MATLAB Robotics System Toolbox UAV Library Visual ...
How to obtain the per UE PRB allocation in NetSim 5G?
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13.0 v13.1 TABLE OF CONTENTS Introduction How to enable the PRB Log file? In v13.1 Network scenario: PRB Allocation Logic Case 1: Round Robin Scheduling PRB Allocation Case 2: ...
5G Use Case: Analysis of throughput variation as a UE moves away from the gNB
Applicable Versions NetSim Standard NetSim Pro Use Case: Impact of distance on the throughput of a 5G scenario where the UE continuously moves away from the gNB . Applicable Release v13.3 v14.0 Network Scenario: To model a 5G- NR scenario, we base ...
5G RAN Use Case: Analyzing the impact of numerology on throughput and latency
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13.3 v14.0 Use Case: Impact of numerology on throughput and latency of a 5G NR scenario having 1 gNB connected to 25 phones, 6 sensors, and 3 cameras, with multiple TCP and UDP flows ...
At what time instants are SNR and SINR calculated in NetSim 5G?
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13 v14.0 The SNR calculation in the SSB and the SINR calculations in the PDSCH and PUSCH are done: First when the two MIBs are sent (at 80ms and 160ms) Next when the RRC_SI is sent ...
How to integrate SUMO for 5G simulations in NetSim?
` Applicable Versions NetSim Standard NetSim Pro In 5G simulations, SUMO can be integrated to introduce vehicular mobility in the UEs. This will require modifications to the underlying GUI property files. Applicable Releases v15 Steps to add SUMO ...
How to add spurious noise in 5G-NR
Applicable Versions NetSim Standard NetSim Pro 5G communication environments are expected to be used alone in a few actual cases. Instead, typically, they are expected to be added to existing communication environments with LTE, Wi-Fi, etc. In these ...
How is the cell selection and UE attach procedure modeled in NetSim 5G ?
In NetSim, all gNBs broadcast MIB and SIB1 control packets at 80 ms and 160 ms (and continue broadcasting at every 80/160 ms intervals subsequently). The UE makes an initial decision on which will be its serving gNB. The UE attaches itself initially ...
How can we simulate mid-band/C-band, at 3.5 GHz band (n78) in NetSim 5G NR?
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13 The band can be selected in gNB properties Set the Phy layer -> CA-Type as Single_Band and then select the CA configuration as n78, Useful Links 1. NetSim 5G overview: ...
Can a non standard gNB height be set in NetSim 5G NR simulation?
Applicable Versions NetSim Standard NetSim Pro The height of the gNB is a user-defined value. When the chosen scenario is Urban Macro, the height of the gNB that a user would typically enter is 25m, which is the value provided in the standard. ...
How can I simulate O2I loss using buildings in NetSim 5G NR ?
Applicable Versions NetSim Standard NetSim Pro A model for signal attenuation due to path-loss combined with fading, shadowing and O2I loss. The O2I loss is the Outdoor-to-Indoor penetration loss where the signal attenuates when it penetrates through ...
Does NetSim model rain fading?
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13.3 Apart from the channel losses per the 3GPPTR38.900 specifications, NetSim allows modeling additional losses using MATLAB. This includes attenuation due to rain, fog, and gas. ...
Where can I see the bearer (MCS) selected in 5G?
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13.2 v13.3 v14.0 The best bearer (Modulation and Coding) for each gNB-UE pair is computed separately for UL and DL. The radio measurements log file can be enabled from the GUI ...
Where can I find the 5G NR channel models?
Applicable Versions NetSim Standard NetSim Pro 5G NR channel models simulate how radio signals propagate between the gNB and UEs by accounting for path loss, shadowing, and fading. NetSim implements standardized models based on 3GPP TR 38.901 for ...
How does the 5G MAC scheduler work in NetSim?
In NetSim, the MAC scheduler at each base station (gNB) decides the UE-wise PRB allocation for every slot. In FDD, both PDSCH and PUSCH allocations are output per slot, while in TDD, the appropriate (PDSCH or PUSCH) allocation is output every slot ...
What is the impact of placing a building in a NetSim 5G scenario?
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v13 NetSim uses 'buildings' to differentiate between indoor and outdoor propagation per 38.900 sec 7.4. This means that parameters such as indoor distance and penetration losses are ...
Why does propagation loss vary at points equidistant from gNB in NetSim 5G library?
Applicable Versions NetSim Standard NetSim Pro When shadow fading is enabled, path loss is not uniform even at locations that are equidistant from the gNB. This behavior follows the propagation characteristics defined in Table 7.4.1-1 of the 3GPP TR ...
How does the 5G NR PHY link adapt its MCS based on CQI (SINR)?
In NetSim 5G, the sender adapts the MCS based on the received SINR. NetSim assumes that the sender knows the received SINR accurately and instantaneously; this dynamic adjustment is often referred to as inner loop link adaptation. From SINR, NetSim ...
Plotting SNR from all gNBs at UE for 5G/LTE in NetSim
Applicable Versions NetSim Standard NetSim Pro SNR measured by UE can be logged into a text file in a format expected by the NetSim metrics window. Upon adding a reference to the SNR plot text files in the Metrics.xml file we can conveniently obtain ...
How can I log SINR, CQI, MCS into a file in NetSim 5G/LTE?
The radio measurements file logs SINR, SNR, CQI, MCS, interference, pathloss, shadow fading loss, and other parameters at each TTI into a CSV file. NetSim currently logs wideband CQI (not sub-band) since it models flat fading instead of ...